A valve body for pumps has a compressed air-filled chamber in the center thereof and a compressed air supply port through which compressed air is supplied into the compressed air-filled chamber. The outer surface of the valve body is provided with an annular groove-shaped air supply chamber that communicates between the compressed air-filled chamber and a pump-side air chamber. compressed air supplied into the compressed air-filled chamber through the compressed air supply port is supplied into the pump-side air chamber through the air supply chamber.
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4. A piston pump comprising a valve body which comprises:
a compressed air-filled chamber in a center of the valve body;
a compressed air supply port through which compressed air is supplied into said compressed air-filled chamber;
a first side wall joined to a first air chamber block that defines a first air chamber and that has at least one first through-hole;
a first communication passage communicating between said compressed air-filled chamber and said first side wall;
a second side wall joined to a second air chamber block that defines a second air chamber and that has at least one second through-hole;
a second communication passage communicating between said compressed air-filled chamber and said second side wall;
an annular groove-shaped first air supply chamber formed in said first side wall, said first communication passage and said at least one first through-hole being communicated with each other through said annular groove-shaped first air supply chamber; and
an annular groove-shaped second air supply chamber formed in said second side wall, said second communication passage and said at least one second through-hole being communicated with each other through said annular groove-shaped second air supply chamber.
1. A double diaphragm pump comprising a valve body which comprises:
a compressed air-filled chamber in a center of the valve body;
a compressed air supply port through which compressed air is supplied into said compressed air-filled chamber;
a first side wall joined to a first air chamber block that defines a first air chamber and that has at least one first through-hole;
a first communication passage communicating between said compressed air-filled chamber and said first side wall;
a second side wall joined to a second air chamber block that defines a second air chamber and that has at least one second through-hole;
a second communication passage communicating between said compressed air-filled chamber and said second side wall;
an annular groove-shaped first air supply chamber formed in said first side wall, said first communication passage and said at least one first through-hole being communicated with each other through said annular groove-shaped first air supply chamber;
an annular groove-shaped second air supply chamber formed in said second side wall, said second communication passage and said at least one second through-hole being communicated with each other through said annular groove-shaped second air supply chamber.
2. The double diaphragm pump of
3. The double diaphragm pump of
5. The piston pump of
6. The piston pump of
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1. Field of the Invention
The present invention relates to a valve body usable in various pumps such as diaphragm pumps and piston pumps.
2. Technical Field of the Invention
There have heretofore been known valves usable in various pumps such as diaphragm pumps and piston pumps (for example, see U.S. Pat. Nos. 5,664,940, 6,158,982, 5,927,954, 5,860,794 and 5,368,452).
In general, a diaphragm pump is operated by using compressed air supplied through a valve as a drive source. As is well known, two diaphragms disposed in bilateral symmetry are provided on the opposite ends, respectively, of a center shaft reciprocatable in the axial direction, and air chambers defined inside the respective diaphragms are periodically supplied with compressed air through a valve, thereby repeating the push-pull operation of the pair of diaphragms to perform a pumping action.
The valve body 51 is provided with a piping block 55. The piping block 55 is formed with two air supply passages 56 and 57 through which compressed air supplied into the compressed air-filled chamber 50 of the valve body 51 from a compressed air supply port (not shown) is supplied into the air chambers, respectively, and also formed with an air release passage 58 through which the compressed air supplied into the compressed air-filled chamber 50 is released into the atmosphere. A slide member 59 associated with the passages 56, 57 and 58 is disposed in the compressed air-filled chamber 50 in engagement with the switching member 54.
In the state shown in
In the conventional pump valve as shown in
The present invention has been made in view of the above-described problems associated with the related background art. Accordingly, an object of the present invention is to provide a valve body for pumps in which large air supply chambers are formed in side walls of the valve body that correspond to air chamber blocks, respectively, to increase the degree of freedom in forming air supply passages and in forming through-holes in the air chamber blocks and also to increase the ease of installation of the air chamber blocks, thereby allowing reductions in the number of component parts and in the number of assembling steps and also a reduction in the overall size of a pump to which the valve body is applied.
The present invention provides a valve body for pumps that includes a compressed air-filled chamber in the center of the valve body, a compressed air supply port through which compressed air is supplied into the compressed air-filled chamber, and an annular groove-shaped air supply chamber formed on the outer surface of the valve body. The air supply chamber communicates between the compressed air-filled chamber and a pump-side air chamber. In the valve body, compressed air supplied into the compressed air-filled chamber through the compressed air supply port is supplied into the pump-side air chamber through the air supply chamber.
In addition, the present invention provides a valve body for pumps that includes a compressed air-filled chamber in the center of the valve body, a compressed air supply port through which compressed air is supplied into the compressed air-filled chamber, a first side wall joined to a first air chamber block that defines a first air chamber and that has at least one first through-hole, a first communication passage communicating between the compressed air-filled chamber and the first side wall, a second side wall joined to a second air chamber block that defines a second air chamber and that has at least one second through-hole, and a second communication passage communicating between the compressed air-filled chamber and the second side wall. The valve body further includes an annular groove-shaped first air supply chamber formed in the first side wall. The first communication passage and the at least one first through-hole are communicated with each other through the annular groove-shaped first air supply chamber. Further, the valve body includes an annular groove-shaped second air supply chamber formed in the second side wall. The second communication passage and the at least one second through-hole are communicated with each other through the annular groove-shaped second air supply chamber.
The first air supply chamber and the second air supply chamber may be formed in substantially the same annular groove shape. The first communication passage and the second communication passage may each comprise a plurality of communication passages.
The valve body for pumps may be applied, for example, to a double diaphragm pump or a piston pump.
The valve body for pumps according to the present invention has a compressed air-filled chamber in the center of the valve body and a compressed air supply port through which compressed air is supplied into the compressed air-filled chamber. The outer surface of the valve body is provided with an annular groove-shaped air supply chamber that communicates between the compressed air-filled chamber and a pump-side air chamber. In the valve body, compressed air supplied into the compressed air-filled chamber through the compressed air supply port is supplied into the pump-side air chamber through the air supply chamber. Accordingly, the large air supply chamber formed on the outer surface of the valve body makes it possible to increase the degree of freedom in forming communication passages and in forming through-holes in air chamber blocks and also to increase the ease of installation of the air chamber blocks, thereby allowing reductions in the number of component parts and in the number of assembling steps and also a reduction in the overall size of a pump to which the valve body is applied, and yet enabling the pump capacity to be increased. In addition, the communication passages can be shortened to reduce the resistance as compared with the air supply passages in the conventional valve body for pumps.
The best mode for carrying out the valve body for pumps according to the present invention will be explained below with reference to the accompanying drawings. The valve body for pumps according to the present invention is applicable to various pumps such as diaphragm pumps and piston pumps.
The diaphragm covers 60 and 61 form therein diaphragm chambers 64 and 65, respectively. A diaphragm 66 is clamped between the diaphragm cover 60 and a first air chamber block 67 to isolate the diaphragm chamber 64 from a first air chamber 68. Similarly, a diaphragm 69 is clamped between the diaphragm cover 61 and a second air chamber block 70 to isolate the diaphragm chamber 65 from a second air chamber 71.
The two diaphragms 66 and 69 are secured to the opposite ends, respectively, of a center shaft 3 reciprocatably extending (in the horizontal direction in
As shown clearly in
The valve body 1 is equipped with a switching valve member 8 shown in
As shown in
The operation of the pump will be explained below. In the state shown in
Although in the above-described embodiment the valve body 1 for pumps is applied to a diaphragm pump, the valve body 1 may, as shown in
In the examples shown in
The first communication passage 11 communicates with the first air supply chamber 9 in the first side wall 6 through the first flow dividing passage 11a, and the first air supply chamber 9 communicates with the at least one first through-hole (not shown) of the cylinder block 78. Accordingly, the first communication passage 11 allows compressed air supplied into the compressed air-filled chamber 2 to be supplied into the first air chamber 68, which is defined by the cylinder block 78, through the first air supply chamber 9. On the other hand, the second communication passage 12 has the second flow dividing passage 12a communicated with the second air chamber 71 through a connecting pipe 80. Thus, the second communication passage 12 allows compressed air supplied into the compressed air-filled chamber 2 to be supplied into the second air chamber 71 through the second air supply chamber 10 and the connecting pipe 80. Thus, the valve body 1 for pumps according to the present invention can be applied to a piston pump in the form as applied to a double diaphragm pump. It should be noted that when the valve body 1 for pumps is applied to a piston pump, the second air supply chamber 10 need not necessarily be formed in the valve body 1.
Murata, Minoru, Murata, Shigeru
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Jan 15 2010 | MURATA, MINORU | YAMADA CORPORATION | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 023930 | /0777 | |
Jan 15 2010 | MURATA, SHIGERU | YAMADA CORPORATION | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 023930 | /0777 | |
Feb 12 2010 | YAMADA CORPORATION | (assignment on the face of the patent) | / |
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